A number of posts have appeared about Zynq SDRs on the "Shera revisited" thread. So, I'd like to ask the more general question: Are there any low cost SDRs that are suitable for measuring phase noise when coupled with a DMTD? I believe what I'm looking for is something with enough bits to work in the audio range down to DC. Yes, I could use a modified sound card, but I'm really looking for something not sound card related. My thought was to use a DMTD with a heterodyne frequency of maybe 5KHz.
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